The Auto Prof joins MACS Training Event
September 23, 2022
The Auto Prof is an automotive technical training organization. Company principal, Mike Bailey is a licensed automotive technician and instructor since 1991.Read Article >
CPI Fluid Engineering is a new MACS exhibitor
September 14, 2022
CPI, founded in 1971, is a global expert in engineering fluids for challenging applications in heat transfer and compression. “Our mission is to advance the industries we serve by providing world-class engineered performance fluids, unmatched customer support and innovative collaboration.”Read Article >
Don’t overlook a diagnostic clue
September 13, 2022
When thinking about the topic of A/C diagnostic tools, a recovery, recycle, recharge machine (R/R/R machine) is not one of the first tools that comes to mind. It may not come to mind at all in the world of inexperienced technicians.Read Article >
MACS Welcomes ATech as an exhibitor
September 7, 2022
ATech Training was founded in 1984 with a desire to develop products that aid instructors in presenting a hands-on approach to teaching and learning the skills of diagnosing and repairing vehicles.Read Article >
Unlocking the compressor Lock up, PT. 2
August 30, 2022
I was driving the van home in the afternoon. It was about 45° F outside and the heater was on. It had been an uneventful 15 to 20 minutes’ drive at about 55 to 60 mph. Slowing down to make a 90 degree turn on to a different road, a faint grinding noise was heard. I rolled the window down and drove along at about 5 MPH and could hear the noise more distinctly. The next step was to pull over into a parking lot and leave the engine running and raise the hood.Read Article >
Why did the compressor lock up?
August 10, 2022
All too often when a compressor lock-up occurs, the compressor itself is blamed for the lock-up. While it is possible for a manufacturing defect to cause a lock-up, there is usually a problem related to the service work or a problem with the system that is the culprit.Read Article >
An expansion valve myth explored
July 26, 2022
I have encountered many tech calls where a technician had replaced an expansion valve because of a problem with an evaporator freezing up and was frustrated because that did not fix the problem.Read Article >
A/C not cooling fast enough
July 13, 2022
When a vehicle sits outside in direct sunlight, a tremendous amount of heat can build up inside. Even with relatively mild summer ambient temperatures (75° F to 80°F) vehicle interiors can easily reach temperatures of 125° F or more. Consider that this heat is not just in the air inside, but also in the seats, dashboard, floor board, roof, door panels, etc, (essentially the entire inside of the vehicle).Read Article >
It’s still not blowing cold enough
July 6, 2022
This customer came in with this car (he provided the vehicle information) and said it isn't blowing cold enough and wants me to make it blow colder. He just recently bought it and this is the first “hot spell” we’ve had since he’s had it.Read Article >
It isn’t blowing cold enough
June 29, 2022
"It isn't blowing cold enough.” Most any auto repair shop that does A/C work will often hear customers say this phrase. It can be the result of any number of things that can be wrong with an A/C system. Often it is a case of common things such as, a low refrigerant charge, a refrigerant overcharge, contaminated refrigerant, a blend door issue, a cooling fan problem, or maybe a weak compressor.Read Article >
A new refrigerant for Trucks?
May 4, 2022
EPA has listed HFO-1234yf under the Significant New Alternatives Policy Program for Motor Vehicle Air Conditioning in Non-road Vehicles and Servicing Fittings for Small Refrigerant CansRead Article >
The desiccant myth
April 12, 2022
There is a myth that exists involving A/C service work and driers that seems to come up from time to time. I have encountered it when handling tech calls and have seen it come up in A/C forums. Read more to find out what it is.Read Article >